ABSTRACT

Lead-cooled fast reactor (LFR) is one important candidate for the advanced reactors for future sustainable energy supply due to its excellent inherent safety and economic characteristics. The fuel management scheme of LFR affects application potentials and fuel cycle scheme of the entire nuclear system. In order to research the establishment and evaluation of the mixed refueling scheme for LFR, a mixed refueling scheme was adopted and established in this paper for the core of 1000MW_th Medium-power Modular Lead-cooled Fast Reactor M²LFR-1000. The neutronic performance analysis was conducted from the first cycle to the equilibrium cycle by using the neutronics analysis code SRAC. The calculation results showed that an acceptable fuel management scheme for LFR was obtained. The cycle length of this scheme can reach 18 months and the radial assembly power peaking factors of the first six cycles are all below the design limits. Evaluations of other important neutronic parameters also proved that this mixed refueling scheme could be applied to the M²LFR-1000 core.

摘要

铅冷快堆（LFR）具有出色的固有安全性和经济特性，因此是未来用于可持续能源供应的先进反应堆的重要候选人之一。LFR的燃料管理方案会影响整个核系统的应用潜力和燃料循环方案。为了研究LFR混合加油方案的建立和评价，本文针对1000MW _th中功率模块化铅冷快堆M ²的堆芯采用了混合加油方案。LFR-1000。使用中子分析代码SRAC，从第一个循环到平衡循环进行中子性能分析。计算结果表明，获得了可接受的LFR燃料管理方案。该方案的周期长度可以达到18个月，并且前六个周期的径向装配功率峰值因子均低于设计极限。对其他重要中子参数的评估也证明了这种混合加油方案可以应用于M ² LFR-1000堆芯。